A really interesting take on the theme! I like that you don't get to control the spells but rather switches after using it all. The controls feel nice and I don't think I've ever seen this camera perspective in a game before too?
The gameplay is quite fun, since each spell is unique, there's always a different strategy when using a certain spell, it spices up the gameplay a lot and prevents it from being stale. Dodging attacks is also fine.. except for the attack where the boss (enemy?) goes into the middle and shoots a circle of projectiles. It seemed impossible to dodge? No matter what I did I would always get hit by those projectiles and I don't see any "safe zones" too.
Still I really like the concept and the camera is really cool!